Working machine

ABSTRACT

A working machine includes a machine body including a motor room, a motor mounted on the machine body and housed in the motor room, a fan arranged above the motor, the fan being to generate an air flow downward, a radiator arranged above the fan, an oil cooler arranged above the fan, and a shroud disposed around the fan. The shroud includes an opening rim portion forming an air inlet to take air from the motor room.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of application Ser. No.14/862,486, filed Sep. 23, 2015, the contents of which are incorporatedherein by reference in their entirety. The present application claimspriority under 35 U.S.C. § 119 to Japanese Patent Application No.2014-202390, filed Sep. 30, 2014 and to Japanese Patent Application No.2014-202391, filed Sep. 30, 2014. The contents of these applications areincorporated herein by reference in their entireties.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a working machine such as a skid steerloader, a track loader, and a compact track loader.

Description of Related Art

There has been a working machine having a configuration where aradiator, an oil cooler, and a condenser are arranged in the order ofdescription from behind, in front of an engine (a motor) and inside abonnet (an engine hood). The working machine are previously known (forexample, refer to Japanese Unexamined Patent Application Publication No.H08-113043). In addition, there has been a working machine having aconfiguration where a radiator, an oil cooler, and a condenser arearranged in the order of description from below and above an engine (amotor). The working machine are also previously known.

In addition, there has been a working machine having: a fan; a shroud;and a support member, the fan being configured to cool an engine (amotor), the shroud surrounding a circumference of the fan to rectify aflow of cooling air, the support member being configured to support afan motor for driving the fan. The working machine are previously known(for example, refer to Japanese Unexamined Patent ApplicationPublication No. 2013-104310).

In the technique disclosed in Japanese Unexamined Patent ApplicationPublication No. 2013-104310, a support member configured to support amotor fan includes: a motor attachment portion; and a fixation portion,the motor attachment portion being configured to accept attachment ofthe fan motor and horizontally extending to stride over a housing framefor housing a heat exchanger, the fixation member extending from bothend portions of the motor attachment portion toward the housing frameand being attached to the housing frame. In such configuration, themotor attachment portion of the support member interferes with accessfrom a side of the fan motor to cooling devices (a radiator, an oilcooler, and the like), the cooling devices being disposed on the fan andon an upper stream side of the fan. The configuration makes amaintenance work for the cooling devices hard.

BRIEF SUMMARY OF THE INVENTION Problems to be Solved by the Invention

However, in the above-mentioned arrangement and configuration, the airgenerated by driving the fan for cooling the engine (the motor) flowstoward the radiator through the condenser and the oil cooler. Thus, theair passes through the condenser and the oil cooler to be warmed. Thewarmed air is used for cooling the radiator, thereby degrading the heatexchange efficiency of the radiator. In addition, the air flowing towardthe radiator is blocked when only one of the condenser and the oilcooler is clogged up, and accordingly the heat exchange efficiency ofthe radiator is further degraded.

To solve the above mentioned problems, the present invention intends toprovide a working machine capable of improving the heat exchangeefficiency of the radiator and of suppressing degradation of performanceof the radiator even when the oil cooler is clogged up, in the workingmachine arranging the radiator and the oil cooler above the engine (themotor).

To solve the above mentioned problems, the present invention intends toprovide a working machine, the working machine allowing easy access froma side of the fan motor to the cooling device disposed on the fan and onan upper stream side of the fan, and thus the working machine making amaintenance work for the cooling devices easy.

Means of Solving the Problems

To solve the above-mentioned technical problems, techniques that thepresent invention provides are characterized in the following points.

In a first aspect of the present invention, a working machine includes:a machine body; a motor mounted on the machine body; a fan arrangedabove the motor, the fan being configured to generate an air flowdownward from above; a radiator arranged above the fan; and an oilcooler arranged in parallel to the radiator.

In a second aspect of the present invention, the working machineaccording to the first aspect of the present invention, includes: ashroud disposed around the fan, the shroud including: a rim portionforming an air vent hole, the air vent hole serving as a passage of theair flow generated by the fan; and a support member attached to an upperportion of the shroud, the support member being configured to supportthe radiator and the oil cooler.

In a third aspect of the present invention, the working machineaccording to the first aspect of the present invention, includes: acondenser arranged above the radiator and the oil cooler.

In a fourth aspect of the present invention, the working machineaccording to the third aspect of the present invention, includes: a staymember being configured to stay the condenser at a tilted-up positionwhere the condenser is tilted upward from upper surfaces of the radiatorand the oil cooler.

In a fifth aspect of the present invention, the working machineaccording to the fourth aspect of the present invention, wherein thestay member includes: a first bracket disposed around the condenser; asecond bracket disposed around the condenser, the second bracket beingdifferent from the first bracket; a shaft portion disposed between thefirst bracket and the second bracket; a frame body configured to supportthe condenser; a joint portion attached to a front portion side of theframe body and connected to the shaft portion; and a stay portionconfigured to stay the condenser at the tilted-up position, thecondenser being tilted by the joint portion turned centering about theshaft portion.

In a sixth aspect of the present invention, the working machineaccording to the fifth aspect of the present invention, wherein thefirst bracket is disposed on a front portion of the shroud in front ofthe condenser, the second bracket is disposed on a side portion of theshroud, the side portion being on a side of the condenser, and the staymember is disposed on a side portion of the shroud, the side portionbeing in rear of the second bracket.

In a seventh aspect of the present invention, the working machineaccording to the third aspect of the present invention, includes: a hoseconnected to the condenser, wherein the shroud includes: a rim portionforming a through hole on a side of the condenser, the through holevertically penetrating the shroud, and the hose is disposed passingthrough the rim portion from below of the condenser and extending toreach an upper portion where the condenser is arranged.

To solve the above-mentioned technical problems, techniques that thepresent invention provides are characterized in the following points.

In an eighth aspect of the present invention, a working machineincludes: a machine body; a motor disposed on a rear portion of themachine body; a fan disposed above the motor; a fan motor configured todrive the fan; a shroud disposed around the fan, the shroud including: afirst rim portion forming an air vent hole, the air vent hole serving asa passage of an air flow generated by the fan; and a support memberconfigured to support the fan motor from below, the support memberincluding: an attachment portion being a portion for attachment of thefan motor; and a support stay extending from the attachment portiontoward the shroud and being fixed at an end portion of the support stay,the end portion being disposed opposite to the attachment portion.

In a ninth aspect of the present invention, the working machineaccording to the eighth aspect of the present invention, comprises: aduct connected to the shroud, the duct being configured to introduce anair, the air passing through the air vent hole, wherein the ductincluding: a second rim portion forming an access hole; a coverconfigured to cover the access hole from an outside, the cover beingconfigured to be freely attached to and detached from the access hole;and a third from portion forming an opening portion, the opening portionbeing configured to exhaust the air to the outside.

In a tenth aspect of the present invention, the working machineaccording to the ninth aspect of the present invention, includes: abonnet disposed to cover a rear portion of the motor, the bonnet beingconfigured to be freely opened and closed, wherein the second rimportion is disposed on a rear portion of the duct.

In an eleventh aspect of the present invention, the working machineaccording to the ninth aspect of the present invention, wherein the fanmotor is constituted of a hydraulic motor, the hydraulic motor beingconfigured to be driven by a hydraulic operation fluid.

In an twelfth aspect of the present invention, the working machineaccording to the eleventh aspect of the present invention, comprises: afirst hydraulic hose configured to supply the hydraulic operation fluidto the hydraulic motor, the hydraulic hose passing through the third rimportion and entering the duct; and a relay portion configured to connectan end portion of the hydraulic hose to a second hydraulic hose otherthan the first hydraulic hose, the end portion being disposed on a sideopposite to another end portion entering the duct.

In a thirteenth aspect of the present invention, the working machineaccording to the twelfth aspect of the present invention, wherein therelay portion is disposed on a side of the third rim portion.

In a fourteenth aspect of the present invention, the working machineaccording to the ninth aspect of the present invention, wherein one ofthe third rim portions is disposed on a right side of the machine body,and the other one of the third rim portions is disposed on a left sideof the machine body.

In a fifteenth aspect of the present invention, the working machineaccording to the eighth aspect of the present invention, includes: amotor room configured to house the motor, wherein the shroud includes: aplate portion having the first rim portion; and a standing portionstanding upward from a circumference of the plate portion, and thestanding portion includes: a fourth rim portion forming an air inlet,the air inlet being configured to take air from the motor room.

In a sixteenth aspect of the present invention, the working machineaccording to the fifteenth aspect of the present invention, includes: aradiator disposed in rear of the standing portion, the radiator having acircumference portion; and a guide member disposed between the standingportion and the circumference portion, the guide member being configuredto guide the air, the air passing through the fourth rim portion.

In a seventeenth aspect of the present invention, the working machineaccording to the sixteenth aspect of the present invention, wherein theguide member includes: a first guide portion arranged above the fourthrim portion and on a position higher than an upper end of the standingportion; and a second guide portion arranged below the fourth rimportion.

Effects of the Invention

A working machine according to the present invention includes: a machinebody; a motor mounted on the machine body; a fan arranged above themotor, the fan being configured to generate an air flow downward fromabove; a radiator arranged above the fan; and an oil cooler arranged inparallel to the radiator. Accordingly, the air of relatively-lowtemperature is used for cooling the radiator, the air not passingthrough the oil cooler, thereby improving the heat exchange efficiencyof the radiator. In addition, since the air not passing through the oilcooler can be introduced to the radiator, the degradation of the heatexchange efficiency of the radiator can be suppressed, the degradationof the heat exchange efficiency being caused by the clogging up of theoil cooler.

A working machine according to the present invention includes: a machinebody; a motor disposed on a rear portion of the machine body; a fandisposed above the motor; a fan motor configured to drive the fan; ashroud disposed around the fan, the shroud including: a first rimportion forming an air vent hole, the air vent hole being for passage ofan air flow generated by the fan; and a support member configured tosupport the fan motor from below, the support member including: anattachment portion being a portion for attachment of the fan motor; anda support stay extending from the attachment portion toward the shroudand being fixed at an end portion disposed opposite to the attachmentportion. According to the above described configurations, the fan can beeasily accessed from the side of the fan motor (from below), and thecooling unit also can be easily accessed through the air vent hole, thecooling unit being disposed on an upper stream side of the fan. In thismanner, the configurations allow good working efficiency in themaintenance thereof.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic back view showing a positional relation between amotor and a cooling unit according to an embodiment of the presentinvention;

FIG. 2 is a schematic side cross-sectional view of a main portion of arear portion of a working machine according to the embodiment;

FIG. 3 is a perspective view of an area around a duct according to theembodiment, seen upward from behind the working machine;

FIG. 4 is a schematic back cross-sectional view of the area around theduct according to the embodiment;

FIG. 5 is a perspective view of a fan, a fan motor, and a shroudaccording to the embodiment, seen upward from behind the workingmachine;

FIG. 6 is a perspective view of an area around the cooling unitaccording to the embodiment, seen downward and diagonally-rightward frombehind the working machine;

FIG. 7 is a perspective view of the area around the cooling unitaccording to the embodiment, seen downward and diagonally-leftward frombehind the working machine;

FIG. 8 is a perspective view of an area around the motor and the coolingunit according to the embodiment, seen downward and diagonally-rightwardfrom ahead of the working machine;

FIG. 9 is a perspective view of an area around a front of the coolingunit according to the embodiment, seen downward and diagonally-rightwardfrom behind the working machine;

FIG. 10 is a schematic view showing a state where the condenser istilted up, using a two-dot chain line virtually showing the condensertilted up;

FIG. 11 is a schematic view explaining a motion of a stay rod accordingto the embodiment, the stay rod continuously moving when the condensermoves from a normal position to a tilted-up position;

FIG. 12 is a perspective view of the cooling unit according to theembodiment, seen upward and diagonally-leftward;

FIG. 13 is a side view of the working machine according to theembodiment; and

FIG. 14 is a front view of the working machine according to theembodiment.

DESCRIPTION OF THE EMBODIMENTS

Referring to drawings, an embodiment of the present invention will bedescribed below.

FIG. 13 is a side view of a working machine according to an embodimentof the present invention. FIG. 14 is a front view of the working machineaccording to the embodiment of the present invention. FIG. 13 and FIG.14 show a Skid Steer Loader (SSL) as an example of the working machineof the present invention. The working machine of the present inventionis not limited to the Skid Steer Loader (SSL), and can be other types ofthe working machine, for example, a Track Loader (TL), a Compact TrackLoader (CTL), and the like.

The skid steer loader 1 is the working machine according to theembodiment. The skid steer loader 1 includes a body 2 of the workingmachine (hereinafter referred to as a machine body 2), a cabin 3, anoperation device 4, and travel devices 5. The cabin 3 is mounted on themachine body 2. The operation device 4 is attached on the machine body2. The skid steer loader 1 includes two travel devices 5; one of thetravel devices 5 is provided on a right side of the machine body 2, andthe other one is provided on a left side of the machine body 2. A motor6 is mounted on a rear portion of the machine body 2. An operator seat 8is provided in the cabin 3. The motor 6 is an engine, an electric motor,and the like. The skid steer loader 1 according to the embodimentemploys a diesel engine. Hereinafter, in explanations of the embodimentof the present invention and in explanations of the modified examples ofthe embodiment, a forward direction (a direction shown by an arrowedline F in FIG. 13) corresponds to a front side of an operator seating onthe operator seat 8 of the skid steer loader 1, a backward direction (adirection shown by an arrowed line B in FIG. 13) corresponds to a backside of the operator, a leftward direction (a direction shown by anarrowed line L in FIG. 14) corresponds to a left side of the operator,and a rightward direction (a direction shown by an arrowed line R inFIG. 14) corresponds to a right side of the operator.

In addition, in explanations of the embodiment of the present inventionand in explanations of the modified examples of the embodiment, adirection from the front side shown by the arrowed line F toward theback side shown by the arrowed line B (or a direction from the back sideshown by the arrowed line B toward the front side shown by the arrowedline A) is referred to as a front to rear direction (or a rear to frontdirection), and a horizontal direction perpendicular to the front torear direction (or the rear to front direction) is a direction K along awidth of the machine body 2. The direction K along the width of themachine body 2 is hereinafter referred to as the machine width directionK. As shown in FIG. 14, in the following description, a direction from acenter portion of the machine body 2 toward the above mentioned rightside can be referred to as an outward direction. And, a direction fromthe center portion of the machine body 2 toward the above mentioned leftside can be also referred to as the outward direction. The outwarddirection is hereinafter referred to as a machine outward direction. Inother words, the machine outward direction corresponds to a directiondeparting from the center portion of the machine body 2 in the machinewidth direction K. A direction opposite to the machine outward directioncan be referred to as an inward direction. The inward direction ishereinafter referred to as a machine inward direction. In other words,the machine inward direction corresponds to a direction toward thecenter portion of the machine body 2 in the machine width direction K.

As shown in FIG. 13 and FIG. 14, the operation device 4 includes booms10, an operation tool 11, lift links 12, control links 13, boomcylinders 14, and bucket cylinders 15.

The operation device 4 includes two booms 10; one of the booms 10 isprovided on a right side of the cabin 3 (referred to as the right boom10) and is capable of freely swinging upward and downward, and the otherone is provided on a left side of the cabin 3 (referred to as the leftboom 10) and is capable of freely swinging upward and downward. Theoperation tool 11 is a bucket (hereinafter referred to as a bucket 11),for example. The bucket 11 is provided on tip portions (front endportions) of the booms 10 and is capable of freely swinging upward anddownward. The lift link 12 and the control link 13 support a baseportion (a rear portion) of the boom 10 so that the boom 10 is capableof freely swinging upward and downward. The boom cylinder 14 is capableof being stretched and shortened, thereby moving the boom 10 upward anddownward. The bucket cylinder 15 is capable of being stretched andshortened, thereby swinging the bucket 11.

The operation device 4 includes a joint pipe 7 having a deformed shape,that is, the joint pipe 7 being a deformed pipe. The joint pipe 7 isconnected to a front portion of the right boom 10 and to a front portionof the left boom 10 between the right boom 10 and the left boom 10,thereby jointing the right boom 10 and the left boom 10 with each other.The operation device 4 includes a joint pipe 9 having a cylindricalshape, that is, the joint pipe 9 being a cylindrical pipe. The jointpipe 9 is connected to a base portion (a rear portion) of the right boom10 and to a base portion (a rear portion) of the left boom 10 betweenthe right boom 10 and the left boom 10, thereby jointing the right boom10 and the left boom 10 with each other. The operation device 4 includestwo lift links 12, two control links 13, and two boom cylinders 14. Oneof the lift links 12 (the right lift link 12), one of the control links13 (the right control link 13), and one of the boom cylinders 14 (theright boom cylinder 14) are provided on a right side of the machine body2, corresponding to the right boom 10 (also referred to as thecorresponding boom 10). And, the other one of the lift links 12 (theleft lift link 12), the other one of the control links 13 (the leftcontrol link 13), and the other one of the boom cylinders 14 (the leftboom cylinder 14) are provided on a left side of the machine body 2,corresponding to the left boom 10 (also referred to as the correspondingboom 10).

The lift link 12 is provided to be vertically arranged on a rear portionof the base portion of the boom 10. The lift link 12 is supported at anupper portion of the lift link 12 by a pivot shaft 16 (a first pivotshaft) to be capable of freely turning about a horizontal axis of thepivot shaft 16, the lift link 12 being supported on the rear portion ofthe base portion of the boom 10 by the pivot shaft 16. In addition, thelift link 12 is supported at a lower portion of the lift link 12 by apivot shaft 17 (a second pivot shaft) to be capable of freely turningabout a horizontal axis of the pivot shaft 17, the lift link 12 beingsupported on the rear portion of the machine body 2 by the pivot shaft17. The second pivot shaft 17 is disposed lower than the first pivotshaft 16.

The boom cylinder 14 is supported at an upper portion of the boomcylinder 14 by a pivot shaft 18 (a third pivot shaft) to be capable offreely turning about a horizontal axis of the pivot shaft 18. The thirdpivot shaft 18 is disposed on the base portion of the boom 10 in frontof the first pivot shaft 16. The boom cylinder 14 is supported at alower portion of the boom cylinder 14 by a pivot shaft 19 (a fourthpivot shaft) to be capable of freely turning about a horizontal axis ofthe pivot shaft 19. The fourth pivot shaft 19 is disposed on a lowerportion of the rear portion of the machine body 2, being lower than thethird pivot shaft 18

The control link 13 is disposed in front of the lift link 12. One end ofthe control link 13 is supported by a pivot shaft 20 (a fifth pivotshaft) to be capable of freely turning about a horizontal axis of thepivot shaft 20. The fifth pivot shaft 20 is disposed on the machine body2, that is, on a corresponding position in front of the lift link 12.The other end of the control link 13 is supported by a pivot shaft 21 (asixth pivot shaft) to be capable of freely turning about a horizontalaxis of the pivot shaft 21. The sixth pivot shaft 21 is disposed on theboom 10 in front of the second pivot shaft 17, being higher than thesecond pivot shaft 17.

Stretching and shortening of the boom cylinder 14 swing the boom 10upward and downward about the first pivot shafts 16, the boom 10 beingsupported on the base portion of the boom 10 by the lift link 12 and thecontrol link 13, thereby moving a tip portion of the boom 10 upward anddownward. The control link 13 is swung upward and downward about thefifth pivot shaft 20 by the swinging upward and downward of the boom 10.The lift link 12 is swung forward and backward about the second pivotshaft 17 by the swinging upward and downward of the control link 13.

An attachment body 23 is pivotally supported on the front portions (thetip portions) of the booms 10. The bucket 11 is attached to theattachment body 23 and is capable of being freely attached and detached.The attachment body 23 is supported on the front portions of the booms10 by a pivot pin 24, thereby being capable of freely turning about ahorizontal axis of the pivot pin 24. Not only the bucket 11, otheroperation tools can be attached to the attachment body 23. The followingattachments (spare attachments) are exemplified as the other operationtools; for example, a hydraulic crusher, a hydraulic breaker, an anglebroom, an earth auger, a pallet fork, a sweeper, a mower, a snow blower,and the like.

The bucket cylinder 15 is arranged on the front portion of the boom 10.The bucket cylinder 15 is pivotally supported on the boom 10 by a firstbucket cylinder pin 26 at an upper portion of the bucket cylinder 15,thereby being capable of freely turning about a horizontal axis of thefirst bucket cylinder pin 26. The bucket cylinder 15 is pivotallysupported on the attachment body 23 by a second bucket cylinder pin 27at a lower portion of the bucket cylinder 15, thereby being capable offreely turning about a horizontal axis of the second bucket cylinder pin27. Stretching and shortening of the bucket cylinder 15 swing the bucket11.

In the embodiment, both of the right travel device 5 and the left traveldevice 5 employ a wheeled travel device, the wheeled travel devicehaving a front wheel 5F and a rear wheel 5R. However, a crawler traveldevice (including a semi-crawler travel device) may be employed as thetravel device 5.

Next, a concrete configuration of the machine body 2 will be describedbelow.

As shown in FIG. 8 and FIG. 13, the machine body 2 includes a main frame205 and support frames 206. The main frame 205 includes a right frameportion 208, a left frame portion 209, and a bottom frame portion 211.The right frame portion 208 constitutes a right portion of the machinebody 2. The left frame portion 209 constitutes a left portion of themachine body 2. The bottom frame portion 211 constitutes a bottomportion of the machine body 2.

As shown in FIG. 13, one of the support frames 206 is disposed on aright side of a rear portion of the main frame 205, and the other one ofthe support frames 206 is disposed on a left side of the rear portion ofthe main frame 205. Each of the support frames 206 includes a rightsupport frame and a left support frame, the right support frame beingdisposed on a right side of the right frame portion 208, the leftsupport frame being disposed on a left side of the left frame portion209.

As shown in FIG. 8 and FIG. 13, each of the support frames 206 (theright support frame and the left support frame) includes: a pair ofsupport walls 229 a and 229 b; and a rear wall 230.

One of the support walls, the support wall 229 a, is separated from theother one of the support walls, the support wall 229 b, in a horizontaldirection perpendicular to the front to rear direction (the machinewidth direction K). The support wall 229 a and the support wall 229 bare disposed to be opposite to each other. The rear wall 230 joints arear end of the support wall 229 a to a rear end of the support wall 229b.

As shown in FIG. 7, a front frame 232 is disposed between the supportframes 206. The front frame 232 joints a front portion of one of thesupport walls 229 a to a front portion of the other one of the supportwalls 229 a, the support walls 229 a being disposed inside. The frontframe 232 includes an upper plate portion 234 and a front plate portion235.

As shown in FIG. 7 to FIG. 9, the front plate portion 235 extendsdownward from a front end of the upper plate portion 234. As shown inFIG. 8, the front plate portion 235 includes a right portion 235 a, aleft portion 235 b, and a center portion 235 c. Additionally in FIG. 8,the front frame 232 is illustrated by a two-dot chain line (a virtualline) to show a second guide portion 453 and a standing portion 438described later.

The right portion 235 a extends downward from a right portion of thefront end of the upper plate portion 234, and contacts to an uppersurface of the right frame portion 208 of the machine body 2. The leftportion 235 b extends downward from a left portion of the front end ofthe upper plate portion 234, and contacts to an upper surface of theleft frame portion 209 of the machine body 2. The center portion 235 cextends downward from the left portion of the front end of the upperplate portion 234, and joints an upper portion of the right portion 235a to an upper portion of the left portion 235 b.

A second support member 458 is disposed on an upper surface of the rightframe portion 208. And, another second support member 458 is disposed onan upper surface of the left frame portion 209. The second supportmember 458 disposed on the right frame portion 208 is arranged in frontof the right portion 235 a of the front frame 232. The second supportmember 458 disposed on the left frame portion 209 is arranged in frontof the left portion 235 b of the front frame 232. The second supportmember 458 disposed on the right frame portion 208 contacts to a frontsurface of the right portion 235 a. The second support member 458disposed on the left frame portion 209 contacts to a front surface ofthe left portion 235 b. A lower portion 459 of a back surface (a backsurface lower portion 459) is arranged in front of the second supportmembers 458, the back surface lower portion 459 being included in thecabin 3.

As shown in FIG. 9, machine body side brackets 236 are disposed on anupper surface of the upper plate portion 234 of the front frame 232. Oneof the machine body side brackets 236 is disposed on the right portionof the machine body 2, the other one of the machine body side brackets236 is disposed on the left portion of the machine body 2, and thereby apivot shaft 238 is supported by the machine body side brackets 236 to becapable of freely turning. The pivot shaft 238 is attached to a cabinside bracket 237, the cabin side bracket 237 being disposed on a lowerend portion of a back surface (a back surface lower end portion) of arear panel 33 of the cabin 3.

The back surface lower portion 459 of the cabin 3 is arranged in frontof the second support member 458. End portions of two gas springs 460are connected to the back surface lower portion 459. The other endportions (not shown in the drawings) of the gas springs 460 are eachconnected to a lower portion of the machine body 2. Stretching of thegas springs 460 lifts up the cabin 3, turning the cabin 3 centeringabout the pivot shaft 238.

As shown in FIG. 2 and FIG. 13, the rear portion of the machine body 2includes an engine room (a motor room) 442 and a bonnet (a rear bonnet)530, the engine room 442 being configured to house the engine (themotor) 6, the bonnet 530 being configured to cover a rear portion of theengine room 442.

As shown in FIG. 2, a tank 532 is disposed in a rear portion of theengine room 442, in particular, the tank 532 is disposed between theengine 6 and the bonnet 530, the tank 532 being configured to storefuel. The tank 532 is supported on a front surface of the bonnet 530 bya support member 533.

As shown in FIG. 1 and FIG. 2, a duct 435 is arranged above the engineroom 442, that is, above the engine 6. A fan 430 is disposed inside theduct 435, the fan 430 being configured to cool the engine 6. A radiator431, an oil cooler 432, and a condenser 433 are arranged above the duct435. Hereinafter, the radiator 431, the oil cooler 432, and thecondenser 433 may be referred to collectively as a cooling unit C.

The radiator 431 cools the cooling water (coolant) supplied to theengine 6. The oil cooler 432 cools the hydraulic operation fluid. Thecondenser 433 condenses the cooling medium (refrigerant) of an airconditioner (not shown in the drawings) arranged inside the cabin 3.

As shown in FIG. 2 to FIG. 5, a fan motor 434 is arranged under the fan430. The fan motor 434 is a hydraulic motor configured to be operated bythe hydraulic operation fluid. A revolution shaft of the fan motor 434vertically extends in the duct 435. The fan 430 is connected to an upperend of the revolution shaft. The fan 430 is driven to revolve by the fanmotor 434, thereby generating an air flow downward from above.

As shown in FIG. 5, the fan motor 434 is supported by a support member449 at a lower portion of the fan motor 434. The support member 449includes an attachment portion 450 and a plurality of support stays 451.The attachment portion 450 is a portion for attachment of the fan motor434, the attachment portion 450 having a circular shape. Each of thesupport stays 451 is connected to the attachment portion 450 to beextended radially centering the attachment portion 450. Each of thesupport stays 451 is fixed to the attachment portion 450 at one end ofthe support stay 451, and is fixed to a shroud 436 at the other end ofthe support stay 451, the shroud 436 being disposed on a circumferentialportion (peripheral portion) of the fan 430.

The number of the support stays 451 is not limited to a specific number.However, it is preferred to determine the number of the support stays451 as small as possible for the purpose of easy access to the fan 430and the like from below and behind, satisfying an ability to support thefan motor 434. For example, the number is determined to five or less(the five support stays 451 are shown in the example of the drawings).In addition, as shown in FIG. 5, it is preferred for the support stays451 adjacent to each other, the support stays 451 being fixed to a rearside of the attachment portion 450, to form an interval larger thanintervals between the other support stays 451, thereby allowing easyaccess from behind the steer skid loader 1.

According to the above described configurations for supporting the fanmotor 434, the fan 430 can be easily accessed from below (from the sideof the fan motor 434), and the cooling unit C also can be easilyaccessed through an air vent hole described below, the cooling unit Cbeing disposed on an upper stream side of the fan 430. In this manner,the configurations for supporting the fan motor 434 allows good workingefficiency in the maintenance of the fan 430, the fan motor 434, and thecooling unit C.

As shown in FIG. 1 to FIG. 5, the shroud 436 includes a plate portion437 and a standing portion 438. A left end of the machine body 2 isconnected to the support wall 229 a disposed on the left side of themachine body 2. A right end of the plate member 437 is connected to thesupport wall 229 a disposed on the right side of the machine body 2. Theplate portion 437 constitutes an upper surface of the duct 435.

The plate portion 437 includes two rim portions 439 and 440, each of therim portions 439 and 440 forming a hole. The rim portion 439 includes acircular frame forming the air vent hole, the air vent hole being usedfor passage of the air flow generated by the fan 430. Hereinafter, therim portion 439 is referred to as a first rim portion 439. The first rimportion 439 is disposed approximately in the center of the plate portion437. The other end of the support stay 451 is fixed near the first rimportion 439.

As shown in FIG. 7, the rim portion 440 forms a through hole verticallypenetrating the plate portion 437, the rim portion 440 being disposed ona right side of the condenser 433. The rim portion 440 has an ellipticshape, the elliptic shape extending along a right side surface of thecondenser 433 in the front to rear direction (or the rear to frontdirection). A hose 441 extending to the condenser 433 passes through therim portion 440. In particular, the hose 441 passes through the rimportion 440 from below of the condenser 433, and extends to reach anupper portion (the plate portion 437) where the condenser 433 isarranged. The hose 441 is a hose for supplying the cooling medium(refrigerant) of the air conditioner to the condenser 433 and forretrieving the condensed cooling medium from the condenser 433.

As shown in FIG. 2, FIG. 6, and FIG. 8, the standing portion 438 standsup upward from a front portion of a circumferential portion of the platemember 437.

The standing portion 438 stands in front of the cooling unit C (theradiator 431, the oil cooler 432, and the condenser 433). A frontportion of the cooling unit C is disposed in rear of the standingportion 438. In addition, as shown in FIG. 6 and FIG. 8, the standingportion 438 includes a fourth rim portion (an opening rim portion) 445having a circular shape, the fourth rim portion 445 forming an air inletfor taking the air. The air inlet is disposed for taking the air heatedin the engine room 442 to send the heated air into the duct 435, asdescribed below in detail.

As shown in FIG. 1, the duct 435 includes a main body portion 446 and acover 448. The cover 448 is attached to the main body portion 446 asdescribed below, the cover 448 being configured to be attached to anddetached from the main body portion 446.

The main body portion 446 covers front portions, rear portions, andlower portions of the fan 430 and the fan motor 434 with the cover 448attached to the main body portion 446. The plate portion 437 is arrangedabove the fan motor 434. The duct 435 is constituted of the main bodyportion 446, the cover 448, and the plate portion 437.

In particular, the main body portion 446 constitutes a front surface, arear surface, and a lower surface of the duct 435 with the cover 448attached to the main body portion 446, and the plate portion 437constitutes an upper surface of the duct 435.

As shown in FIG. 3, a second rim portion 443 is formed on a portionopposite to the bonnet 530, that is, on a rear portion of the main bodyportion 446, the second rim portion 443 forming an access hole. Thesecond rim portion 443 is disposed extending from a rear surface of themain body portion 446 to a lower surface of the main body portion 446.In particular, the second rim portion 443 forms the access hole, theaccess hole extending from an upper end portion of the rear surface ofthe main body portion 446 to a lower end portion of the rear surface,continuing from the lower end portion to the lower surface of the mainbody portion 446, and further extending forward on the lower surface.

As shown in FIG. 3, in view of the easy maintenance, it is preferred forthe second rim portion 443 to be disposed at a portion where at leastthe whole of the fan motor 434 and the attachment portion 450, and thefan 430, the first rim portion 439, and the support stay 451 arrangedaround the fan motor 434 and the attachment portion 450 can be visiblefrom outside through the access hole.

The cover 448 is attached to the second rim portion 443, the cover 448being configured to be freely attached to and detached from the secondrim portion 443, thereby covering the access hole from outside. FIG. 1shows a state where the cover 448 is attached to the second rim portion443. FIG. 3 shows a state where the cover 448 is detached from thesecond rim portion 443.

As shown in FIG. 3, when the cover 448 is detached from the main bodyportion 446, the access hole is opened, and then the inside of the duct435 can be accessed from back and below. In this manner, the fan 430 andthe fan motor 434 can be easily maintained, and the inside of the duct435 can be easily cleaned. In addition, when a high pressure air isinjected upward from the access hole, the high pressure air passesthrough the air vent hole formed on the plate portion 437, the plateportion 437 constituting the upper surface of the duct 435, and reachesthe lower surfaces of the radiator 431 and the oil cooler 432. Thus, theradiator 431 and the oil cooler 432 can be easily cleaned routinely,thereby reducing the clogging of the radiator 431 and the oil cooler432.

As shown in FIG. 4, a right end portion of the duct 435 is connected tothe support wall 229 a, the support wall 229 a being placed on the rightside of the machine body 2. A left end portion of the duct 435 isconnected to the support wall 229 a, the support wall 229 a being placedon the left side of the machine body 2. The duct 435 is radiallyenlarged downward to be closed to the side portion. And thus, the duct435 has a vertical cross sectional area enlarged downward. A third rimportion 444 is formed on a side end portion of the duct 435, that is, ona right end portion and a left end portion of the duct 435, the thirdrim portion 444 forming an opening portion. The opening portion exhauststhe air from the duct 435, the air being taken into the duct 435 bydriving the fan 430 through the air vent hole disposed on the plateportion 437.

The support wall 229 a includes an exhaust opening for exhausting theair being in the duct 435 toward the outside of the machine body 2. Asshown in FIG. 4 and FIG. 8, the exhaust opening is formed of a circularrim portion 565 (hereinafter referred to as a fifth rim portion 565),being surrounded by the circular rim portion 565. A frame member 566 isattached to the fifth rim portion 565, the frame member 566 having agrille. The third rim portion 444 is disposed near the fifth rim portion565, the third rim portion 444 forming an opening portion of the duct435. In this manner, the air being in the duct 435 is exhausted from theexhaust opening toward the outside of the machine body 2.

As shown in FIG. 4, a relay portion 567 of a hydraulic hose in disposedon the fifth rim portion 565, the fifth rim portion 565 being formed onthe support wall 229 a of the support frame 206 disposed on the rightside. The relay portion 567 includes a pipe joint for jointing at leasttwo hoses to each other. Two of first hydraulic hoses 571 are connectedto the relay portion 567, the first hydraulic hoses 571 passing throughthe third rim portion 444 of the duct 435 and being withdrawn from theduct 435. In addition, two of second hydraulic hoses 568 are connectedto the relay portion 567, the second hydraulic hoses 568 being disposedin the engine room 442.

Of two first hydraulic hoses 571, one of the first hydraulic hoses 571(referred to as a supply hose) supplies a hydraulic operation fluid tothe fan motor 434, and the other one of the first hydraulic hoses 571(referred to as an exhaust hose) exhausts the hydraulic operation fluidfrom the fan motor 435.

One end of the supply hose is connected to an oil filler port of the fanmotor 434, the one end being an end portion disposed on an entry side ofthe duct 435 (on an inner side of the duct 435), and the other end ofthe supply hose is connected to the relay portion 567. One end of theexhaust hose is connected to an exhaust port of the fan motor 434, andthe other end of the discharge port is connected to the relay portion567.

Of two second hydraulic hoses 568, one of the second hydraulic hoses 568is connected to the relay portion 567 at one end portion of the secondhydraulic hose 568, and is connected to a discharge port of a hydraulicpump (not shown in the drawings) at the other end of the secondhydraulic hose 568. Of two second hydraulic hoses 568, the other one ofthe second hydraulic hoses 568 is connected to the relay portion 567 atone end portion of the second hydraulic hose 568, and is connected to anintake port of the hydraulic pump (not shown in the drawings) throughthe oil filter (not shown in the drawings) at the other end portion ofthe second hydraulic hose 568.

Considering the fan motor 434 arranged in the duct 435, the duct 435 hasto have a hole for insertion of the hydraulic hose, the hydraulic hosebeing configured to supply the hydraulic operation fluid to the fanmotor 434, in order to connect the hydraulic hose to the fan motor fromthe outside of the duct 435. However, the above-described configurationrequires a structure for sealing a gap between the hydraulic hose andthe hole, the structure being configured to prevent the heated air inthe duct 435 from leaking from the gap to flow into the engine room 442.Thus, the configuration requires a large number of the parts. In theembodiment, since the above-described relay portion 567 is disposed, thehydraulic hose can be connected to the fan motor 434 from the outside ofthe duct 435 without forming a hole on the duct 435. Thus, the presentinvention does not need the sealing structure, thereby reducing thenumber of parts.

As shown in FIG. 2, FIG. 6, and FIG. 7, guide members 452 and 453 aredisposed between the standing portion 438 and a front portion of theradiator 431, the guide members 452 and 453 being configured to guidethe air taken through the fourth rim portion 445. The guide memberincludes a first guide portion 452 and a second guide portion 453.

The first guide portion 452 is arranged above the fourth rim portion 445and on a position higher than an upper end of the standing portion 438.As shown in FIG. 7 and FIG. 9, the first guide portion 452 isconstituted of the upper plate portion 234, the upper plate portion 234supporting a rear portion of the cabin 3. The upper plate portion 234extends in the machine width direction K to cover the standing portion438 from above, covering over from a left end of the standing portion438 to a right end of the standing portion 438, and extends in the frontto rear direction, extending from a portion in front of the standingportion 438 to a portion in rear of the standing portion 438.

As shown in FIG. 2 and FIG. 6, the second guide portion 453 is arrangedbelow the fourth rim portion 445. As shown in FIG. 12, the second guideportion 453 is a plate portion in one body with a support member 487,the support member 487 being configured to support the radiator 431 andthe oil cooler 432. The second guide portion 453 is disposed in front ofand below the radiator 431. The second guide portion 453 extends forwardand toward the standing portion 438, and includes a through hole 488vertically penetrating the second guide portion 453.

As shown by an arrowed line in FIG. 2, the air heated in the engine room442 (the heated air) flows upward passing through between a frontsurface of the duct 435 and a front plate portion 235 of the front frame232, and then the heated air flows backward along a lower surface of theupper plate portion 234 to be taken into a front of the radiator 431from the air inlet formed by the fourth rim portion 445 of the standingportion 438. The taken heated air is introduced into the duct 435 by theair flow, the air flow formed by the fan 430, and is exhausted to theoutside of the machine body 2 through the exhaust opening formed in thesupport wall 229 a. In this manner, the heated air does not stay in theengine room 442, and thereby a temperature in the engine room 442 isreduced to improve the heat balance performance.

As shown in FIG. 2, a bonnet upper cover 570 is disposed in front of thebonnet 530 and above the condenser 433. As shown in FIG. 9, the bonnetupper cover 570 has many opening portions, each of the opening portionshaving a slit shape. The opening portions can release the heated airfrom the opening portion of the bonnet upper cover 570 to the outside ofthe machine body 2 even when the engine 6 stops (the fan 430 stops), theheated air being taken into the air inlet.

Next, an arrangement structure of the cooling unit C will be described.

As shown in FIG. 1 and in other drawings, the radiator 431 and the oilcooler 432 are arranged above the fan 430. The condenser 433 is arrangedabove the radiator 431 and the oil cooler 432. The radiator 431 and theoil cooler 432 is arranged in parallel adjacent to each other. Inparticular, as shown in FIG. 6, the radiator 431 is arranged on theright side, and the oil cooler 432 is arranged on the left side.

Considering a conventional structure where the radiator, the oil cooler,and the condenser are arranged in the order of description from belowabove the fan, the air heated passing through the condenser and the oilcooler is used for cooling the radiator, thereby degrading the heatexchange efficiency of the radiator. In addition, the air flowing towardthe radiator is blocked when only one of the condenser and the oilcooler is clogged up, and accordingly the heat exchange efficiency ofthe radiator is further degraded. On the other hand, the embodiment ofthe present invention has a structure where: the radiator 431 and theoil cooler 432 is arranged in parallel above the fan 430; and thecondenser 433 is arranged above the radiator 431 and the oil cooler 432.Accordingly, the air of relatively-low temperature is used for coolingthe radiator 431, the air not passing through the oil cooler 432,thereby improving the heat exchange efficiency of the radiator 431. Inaddition, since the air not passing through the oil cooler 432 can beintroduced to the radiator 431, the degradation of the heat exchangeefficiency of the radiator 431 can be suppressed, the degradation of theheat exchange efficiency being caused by the clogging up of the oilcooler 432.

As shown in FIG. 6, FIG. 7, and FIG. 12, the radiator 431 and the oilcooler 432 are supported by the support member 487. The support member487 includes a radiator support portion 485 and an oil cooler supportportion 486. The radiator support portion 485 is a support portiondisposed to surround a circumferential portion of the radiator 431. Theoil cooler support portion 486 is a support portion disposed to surrounda circumferential portion of the oil cooler 432. The support member 487is placed on an upper portion of the shroud 436, specifically, on anupper surface of the plate portion 437 of the shroud 436.

As shown in FIG. 12, the radiator support portion 485 includes a rightportion 485A and a left portion 485B.

The right portion 485A is a support member disposed on a right side ofthe radiator 431, the right portion 485A being configured to support aright portion of the radiator 431. The right portion 485A includes: abracket 498 disposed on a front portion of the right portion 485A; and abracket 498 disposed on a rear portion of the right portion 485A. Thebracket 498 disposed on the front portion is fixed to an upper surfaceof the plate portion 437, and the bracket 498 disposed on the rearportion is also fixed to the upper surface of the plate portion 437.

The left portion 485B is a support member disposed on a left side of theradiator 431, the left portion 485B being configured to support a leftportion of the radiator 431. The left portion 485B is fixed to the uppersurface of the plate portion 437. The right portion 485A and the leftportion 485B support the radiator 431, the radiator 431 being supportedfloating above from the plate portion 437.

As shown in FIG. 12, the oil cooler support portion 486 includes thefront portion 486A and the rear portion 486B. The front portion 486A isa support member disposed on a front side of the oil cooler 432, thefront portion 486A being configured to support a front portion of theoil cooler 432. The front portion 486A is fixed to the upper surface ofthe palate portion 437. The rear portion 486B is a support memberdisposed on a rear side of the oil cooler 432, the rear portion 486Bbeing configured to support a rear portion of the oil cooler 432. Therear portion 486B is fixed to the upper surface of the palate portion437. The front portion 486A and the rear portion 486B support the oilcooler 432, the oil cooler 432 being supported floating above from theplate portion 437. In this manner, the radiator support portion 485 issupported on the right portion of the plate portion 437, and the oilcooler 432 is supported on the left portion of the plate portion 437.

The condenser 433 is supported above the radiator 431 and the oil cooler432 by a stay member 467.

As shown in FIG. 7, the stay member 467 is capable of moving thecondenser 433 from a normal position to a tilted-up position, the normalposition being a position where the condenser 433 is arranged inparallel to the upper surfaces of the radiator 431 and the oil cooler432, the tilted-up position being a position where the condenser 433 istilted upward from the upper surfaces of the radiator 431 and the oilcooler 432 as shown in FIG. 10, and the stay member 467 is capable ofstaying the condenser 433 at the tilted-up position.

As shown in FIG. 6 and FIG. 7, the stay member 467 includes a firstbracket 468, a second bracket 469, a third bracket 478, a fourth bracket479, a first shaft portion 470, a second shaft portion 477, a frame body471, a first joint portion 472, a second joint portion 491, and a stayportion 473.

The first bracket 468 is fixed to a front portion of the oil coolersupport portion 486, being near a left side of the front portion, at oneend of the first bracket 468, and the other end of the first bracket 468is extended to the front side of the condenser 433 on the left sidethereof. The second bracket 469 is fixed to a side portion (a rightportion) of the radiator support portion 485, being near a front side ofthe radiator support portion 485, at one end of the second bracket 469,and the other end of the second bracket 469 is extended to a side (aright side) of the condenser 433, being near a front side of thecondenser 433.

The first shaft portion 470 bridges over between the other and of thefirst bracket 468 and the other end of the second bracket 469.

The third bracket 478 is fixed to a side portion (a right portion) ofthe radiator support portion 485, being near a rear side of the radiatorsupport portion 485, at one end of the third bracket 478, and the otherend of the third bracket 478 is extended to the side (the right side) ofthe condenser 433, being near a rear side of the condenser 433. Thefourth bracket 479 is fixed to a rear portion of the oil cooler supportportion 486, being near a left side of the rear portion, at one end ofthe fourth bracket 479, and the other end of the fourth bracket 479 isextended to the rear side of the condenser 433 on the left side thereof.

The second shaft portion 477 bridges over between the other and of thethird bracket 478 and the other end of the fourth bracket 479.

The first shaft portion 470 is attached to the first bracket 468 and tothe second bracket 469, and is capable of freely turning on the firstbracket 468 and the second bracket 469. The second shaft portion 477 isattached to the third bracket 478 and to the fourth bracket 479, and iscapable of freely attached to and detached from the third bracket 478and the fourth bracket 479. A joint member 480 joints the left portionof the first shaft portion 470 to the left portion of the second shatportion 477. Another joint member 480 joints the right portion of thefirst shaft portion 470 to the right portion of the second shat portion477. In this manner, when the first shaft portion 470 is turned to tiltup the condenser 433, the tilting up of the condenser 433 detaches thesecond shaft portion 477 from the third bracket 478 and the fourthbracket 479, and then the second shaft portion 477 is lifted togetherwith the condenser 433.

The frame body 471 is a frame having a rectangular shape when seen fromabove, and holds a circumference (an outside surface) of the condenser433. The frame body 471 includes a front frame portion 481, a rear frameportion 482, a left frame portion 483, and a right frame portion 484.The front frame portion 481 extends along a front circumference portionof the condenser 433. The rear frame portion 482 extends along a rearcircumference portion of the condenser 433. The left frame portion 483extends along a left portion of the condenser 433. The right frameportion 484 extends along a right portion of the condenser 433. A hoseattachment tool 497 is attached to the right frame portion 484, the hoseattachment tool 497 being configured to attach the hose 441 to the rightframe portion 484.

The first joint portion 472 is connected to a right portion of the firstshaft portion 470. The other first joint portion 472 is connected to aleft portion of the first shaft portion 470. The first joint portion 472connected to the left portion of the first shaft portion 470 is attachedto a front portion of the left frame portion 483 of the frame body 471,interposing a first attachment tool 493. The first joint portion 472connected to the right portion of the first shaft portion 470 isattached to a front portion of the right frame portion 484 of the framebody 471, interposing a second attachment tool 494.

The second joint portion 491 is connected to a right portion of thesecond shaft portion 477. The other second joint portion 491 isconnected to a left portion of the second shaft portion 477. The secondjoint portion 491 connected to the right portion of the second shaftportion 477 is attached to a rear portion of the right frame portion 484of the frame body 471, interposing a third attachment tool 495. Thesecond joint portion 491 connected to the left portion of the secondshaft portion 477 is attached to a rear portion of the left frameportion 483 of the frame body 471, interposing a fourth attachment tool496.

The front frame portion 481 of the frame body 471 turns upward centeringabout the first shaft portion 470 together with the first joint portion472, the front frame portion 481 supporting the condenser 433, when thefirst joint portion 472 turns centering about the first shaft portion470. Then, the rear frame portion 482 is lifted up by the turning of thefirst joint portion 472. In this manner, the condenser 433 moves fromthe normal position to the tilted-up position.

As shown in FIG. 7 and FIG. 11, the stay portion 473 includes a staypiece 475 and a stay rod 476.

The stay piece 475 is fixed to the support member 487 at a lower endportion of the stay piece 475, and an upper end portion of the staypiece 475 is positioned on a side (a left side) of the frame body 471,being near a front side of the frame body 471. The stay piece 475 has aslit hole 474 extending vertically. A bent portion 490 is disposed on anupper portion of the slit hole 474, the bent portion 490 extendingbackward from an upper end portion of the slit hole 474 and bendingdownward.

An upper end portion of the stay rod 476 is fixed to a side portion (aright portion) of the second joint portion 491, the second joint portion491 being attached to a rear portion of the right frame portion 484. Alower end portion of the stay rod 476 is engaged into the slit hole 474of the stay piece 475, and is capable of vertically moving (sliding)along the slit hole 474.

As shown in an upper drawing of FIG. 11, a lower end portion 476A of thestay rod 476 is positioned at a lower end portion of the slit hole 474when the condenser 433 is at the normal position. The lower end portion476A of the stay rod 476 moves upward along the slit hole 474 when thecondenser 433 is tilted up. As shown by a solid line in a lower drawingof FIG. 11, the lower end portion 476A of the stay rod 476 is positionedat the bent portion 490 of the slit hole 474 when the condenser 433 isat the tilted-up position. In this manner, the condenser 433 is held atthe tilted-up position as vertically shown by a two-dot chain line inFIG. 10.

As described above, the condenser 433 can be moved from the normalposition to the tilted-up position and can be held at the tilted-upposition, and thus it is possible to clean: the upper surfaces of theradiator 431 and the oil cooler 432; and the lower surface of thecondenser 433, thereby reducing the clogging up of the radiator 431 andthe oil cooler 432.

In the above description, the embodiment of the present invention hasbeen explained. However, all the features of the embodiment disclosed inthis application should be considered just as examples, and theembodiment does not restrict the present invention accordingly. A scopeof the present invention is shown not in the above-described embodimentbut in claims, and is intended to include all modifications within andequivalent to a scope of the claims.

What is claimed is:
 1. A working machine comprising: a machine bodyincluding a motor room; a motor mounted on the machine body and housedin the motor room; a fan to generate an air flow downward, the fan beingarranged above the motor; a radiator arranged above the fan; an oilcooler arranged above the fan; and a shroud disposed around the fan, theshroud including an opening rim portion forming an air inlet to take airfrom the motor room, the shroud having a standing portion arrangedopposed to a front circumference portion of the radiator and opposed toa front circumference portion of the oil cooler, the standing portionhaving the opening rim portion overlapping, above the fan, with theradiator and the oil cooler in a height direction of the standingportion.
 2. The working machine according to claim 1, wherein theradiator is arranged on one side of the machine body in a machine widthdirection, and wherein the oil cooler is arranged on the other side ofthe machine body in the machine width direction.
 3. A working machinecomprising: a machine body including a motor room; a motor mounted onthe machine body and housed in the motor room; a fan to generate an airflow downward, the fan being arranged above the motor; a radiatorarranged above the fan; an oil cooler arranged above the fan; and ashroud disposed around the fan, the shroud including an opening rimportion forming an air inlet to take air from the motor room, the shroudhaving: a plate portion arranged below the radiator and the oil cooler,the plate portion having a rim portion forming an air vent hole servingas a passage of the air flow generated by the fan; and a standingportion arranged opposed to a front circumference portion of theradiator and opposed to a front circumference portion of the oil cooler,the standing portion having the opening rim portion overlapping, abovethe fan and standing upward from a circumference of the plate portion;and a guide member disposed between the standing portion and acircumference portion of the radiator, the guide member being configuredto guide the air passing through the opening rim portion, the guidemember including: a first guide portion arranged above the opening rimportion and on a position higher than an upper end of the standingportion; and a second guide portion arranged below the opening rimportion.
 4. A working machine comprising: a machine body; a motormounted on the machine body; a fan to generate an air flow downward, thefan being arranged above the motor; a shroud disposed around the fan,the shroud having a rim portion forming an air vent hole serving as apassage of the air flow generated by the fan; a duct to introduce airpassing through the air vent hole, the duct being connected to theshroud, the duct having a plate portion having the air vent hole andconstituting an upper surface of the shroud; a fan motor arranged in theduct and configured to drive the fan; and a support member supportingthe fan motor from below, the support member having a support stay fixedto the plate portion.
 5. A working machine, comprising: a machine body;a motor mounted on the machine body; a fan to generate an air flowdownward, the fan being arranged above the motor; a shroud disposedaround the fan, the shroud having a rim portion forming an air vent holeserving as a passage of the air flow generated by the fan; a duct tointroduce air passing through the air vent hole, the duct beingconnected to the shroud; a fan motor arranged in the duct and configuredto drive the fan; a first hydraulic hose entering the duct, thehydraulic hose being configured to supply a hydraulic operation fluid tothe fan motor; and a relay portion configured to connect an end portionof the first hydraulic hose to a second hydraulic hose other than thefirst hydraulic hose, the end portion being disposed on a side oppositeto another end portion entering the duct.